The Sena 20S Motorcycle Bluetooth Communication System helps you to enjoy your ride to the fullest by keeping you in touch with up to eight of your buddies| up to 2.0 km (1.2 miles) away| through the Group Intercom feature. The 20S uses the Universal Intercom protocol so it can be used with all Sena and non-Sena Bluetooth headsets on the market. The 20S delivers HD-quality audio that's clear| precise| and comfortable in every condition. Sena's Advanced Noise Control ensures ambient noise doesn't interfere with incoming and outgoing audio. Bluetooth 4.1 technology| high-quality stereo Bluetooth speakers| and dual-module architecture create a smooth| crisp| and responsive user experience you'll quickly appreciate. Sena 20S Audio Multitasking technology allows you to have an intercom conversation while simultaneously listening to music| FM radio| or GPS. The user interface makes setting up and pairing your 20S incredibly easy| thanks to Sena's motion sensor technology. Pair your Bluetooth devices with a simple shake of the 20S. Once you're on the road| complete control of the 20S can be done through hands-free voice commands. Intuitive technology ensures safe| controlled riding as you seamlessly move through music| phone| and intercom features. Linking up your 20S with the Sena Smartphone app (for Android or iPhone) allows you to configure device settings| set groups of intercom friends| and access an interactive quick start guide. The 20S also offers the ability to pair with up to two mobile phones for convenient hands-free calling.